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## 20/20

Subject: Music

This US group was formed in Los Angeles, California, in 1978 by Steve Allen (guitar, vocals) and Ron Flynt (bass, vocals), two expatriate musicians from Tulsa, Oklahoma. Drummer Mike Gallo ...

## accept

A formal language. See automaton, finite-state automaton.

## absolute frequency

The number of occurrences of an event. For example, if a die is rolled 20 times and 4 sixes are observed the absolute frequency of sixes is 4 and the relative frequency is 4/20.

## Factor Theorem

The following result, which is an immediate consequence of the Remainder Theorem:TheoremLet f(x) be a polynomial. Then x−h is a factor of f(x) if and only if f(h)=0.The theorem is valuable for ...

## warez

The collection of illegal files often found in a depository directory. A typical warez file will contain pirated software.

## wankware

Jargon for pornographic material found on the Internet. It usually refers to pictures and animations. See also pubic directory.

## screenager

A young user of the Internet. The term is usually used to describe someone who is a frequent user.

## leech

Someone who carries out illegal file sharing, for example someone who copies CDs and makes them available to friends.

## acceleration

The rate of change in velocity or the change in velocity occurring over a given time interval: acceleration = change of velocity/time. It is usually expressed as metres per second squared (ms−2). ...

Some electronic document that is emailed to subscribers. For example, a newsletter from a retailer announcing its latest offers.

## equiangular spiral

A curve whose equation in polar coordinates is r=aekθ, where a (>0) and k are constants. Let O be the origin and P be any point on the curve. The curve derives its name from the property that the ...

## excess-3 code

An 8421 code for which the weighted sum of the four bits in each codeword is three greater than the decimal digit represented by that codeword. For example, 9 is represented by 1100, the weighted sum ...

## picture

The principal means of defining data types in Cobol. The syntax of an elementary data item is defined by means of a character string. Simple examples are “A(20)” defining a string of 20 alphabetic ...

## XPath

A language for addressing parts of an XML document, selecting nodes (elements, attributes, character data, etc.) by their name, their value, and/or their location relative to specified other nodes in ...

## binary prefixes

A set of prefixes for binary powers designed to be used in data processing and data transmission contexts. They were suggested in 1998 by the International Electrotechnical Commission (IEC) as a way ...

## common fraction

A term used to mean vulgar fraction or simple fraction. Some authors use it to mean proper fraction.

## Common Intermediate Format

A standard for video conferencing systems which supports data presented at a frame rate of 30 FPS.

## compute server

A system specifically designed to undertake large amounts of computation, usually but not necessarily in a client/server environment.

## con

Short for console, often used in simple programming to refer to the display or keyboard attached to the computer.

## concurrent

Any number of lines are said to be concurrent if there is a point through which they all pass.